1. Technical field
[0001] The present invention relates to an improved system for carrying an object, such
as a backpack or a bag.
2. Prior art
[0002] When carrying an object such as a backpack or a bag, the level of comfort depends
not only on the static load due to the weight of the object but also on the dynamic
load. For example, when a person is walking or running vertical movements and accelerations
of the object can greatly increase the dynamic load compared with the static load.
The faster a person is moving, generally, the greater the dynamic load will be for
a given static load. Therefore, this problem is particularly important in athletic
applications.
[0003] The prior art provides several potential solutions to this problem.
EP 2 371 232 A2 concerns an insert for a carrying strap for carrying objects comprising an essentially
elastic section, and a limitation section, wherein the length of the limitation section
is adjustable.
JP 2005-304827 concerns a satchel intended to be stably carried on a back.
DE 299 10 127 U1 concerns a backpack comprising two carrying straps, wherein each carrying strap comprises
an elastic section and means for limiting the extension of the strap under strain.
JP 5713160 B2 concerns a satchel with two shoulder belts, wherein the shoulder belts comprise an
inner belt and an outer belt.
US 6,070,776 A concerns a backpack in which the length of the shoulder straps automatically adjusts
when the wearer twists his or her torso. The shoulder straps are connected at the
lower end to form one continuous strap. This strap passes below the bottom panel of
the backpack and is contained within a channel. A member of low friction characteristics
enables the continuous strap to slide freely within the channel.
US 2017/0265630 A1 concerns a backpack including a pack body, two shoulder straps extended from the
pack body for allowing the wearer to wear the pack body at the wearer's back and a
suspension arrangement which includes a resilient unit provided between the pack body
and the shoulder straps for absorbing abounding force of the pack body.
US 5,954,253 A concerns a load support system including a flexible frame unit attached to a shoulder
support structure and to a hip belt assembly.
EP 2 324 731 A2 concerns a load carrying system for a wearer, comprising a carrier made of at least
one flexible carrier material and comprising a front portion to be disposed at the
wearer's front and a back portion to be disposed at the wearer's back, when the system
is worn by the wearer.
FR 2 974 981 A concerns a device for carrying loads, comprising a carrier base.
[0005] However, during the dynamic movement of the wearer, the object will generally not
only move vertically but also horizontally. The further the object moves away horizontally
from the centre of mass of the body of the wearer, the heavier the object will feel
to the wearer. For example, generally the torque exerted by the centre of mass of
the object about a pivot, which may be a contacting point of the object on the back
of the wearer, will increase, the further the centre of mass of the object is away
from the centre of mass of the body of the wearer. It is a shortcoming of the prior
art, that this problem is not addressed. This problem is not limited to the dynamic
case, but also applicable under static conditions.
[0006] A problem underlying the present invention is thus to provide a carrying system for
an object that provides greater wearing comfort than existing carrying systems, especially
under dynamic conditions.
3. Summary of the invention
[0007] This object is accomplished by the teachings of the independent claims and in particular
by a carrying system for carrying an object, comprising: (a) an essentially elastic
portion, (b) wherein the essentially elastic portion is attached to the object at
a first position located on the object; and (c) a limitation arrangement, wherein
a length of the limitation arrangement limits a maximum extension of the essentially
elastic portion, and (d) wherein the limitation arrangement is attached at least at
one second position on the object that is different from the first position.
[0008] In this context, an "essentially elastic portion" may return to its unloaded length,
apart from small deviations, after application of a force of up to at least 200 N,
preferably 500 N. A length of an "essentially elastic portion" increases by at least
1%, preferably 5% under application of a force of 100 N. The increase in length under
a load, or a force, is referred to as "extension".
[0009] An advantage of the carrying system according to the present invention is that the
essentially elastic portion pulls the object towards the body of the wearer. In this
context, the wearer is the person carrying the object by means of the carrying system.
For example, the wearer may carry the object on his back. In this case the essentially
elastic portion will pull the object towards the back of the wearer. A key insight
of the inventors is that the essentially elastic portion is attached to the object
at a first position located on the object, whereas the limitation arrangement is attached
at least at one second position on the object that is different from the first position.
[0010] For example, the limitation arrangement may be arranged below the essentially elastic
portion on the object, i.e. the at least one second position is located below the
first position on the object. "Below" means in this context "arranged under" in the
common orientation of the carrying system and the object, when the carrying system
is worn by the user to carry the object. Alternatively, the limitation arrangement
may be arranged above the essentially elastic portion on the object. "Above" means
in this context "arranged higher" in the common orientation of the carrying system
and the object, when the carrying system is worn by the user to carry the object.
[0011] Either arrangement allows the object to be pulled into a more upright arrangement,
thus reducing the torque exerted by the object about a pivot, which may be a contacting
point between the object and the wearer.
[0012] Note that the limitation arrangement and / or the elastic portion may each be attached
to the object at more than one position. In particular, in addition to the at least
one second position, the limitation arrangement may be attached on the object on a
further position that may be different from the first position or may coincide with
the first position. In any case, the limitation arrangement is attached on the object
at least at one position (the
"at least one second position") that is different from the first position.
[0013] The carrying system therefore advantageously dampens forces due to the vertical and
horizontal movement of the object during the movement of the wearer. The limitation
arrangement serves to stabilise the carrying system by limiting the maximum extension
of the essentially elastic portion.
[0014] The limitation arrangement may comprise a limitation strap and a guiding portion,
wherein the guiding portion is attached to the object at the second position, and
wherein the limitation strap is slidably attached to the guiding portion.
[0015] Therefore, the limitation strap may move to adapt to the anatomic requirements of
the wearer and also during the dynamic movement in order to further dampen the forces
due to the vertical and horizontal movement of the object. The guiding portion ensures
sufficient stability by restricting the motion of the limitation strap to be along
the guiding portion.
[0016] The guiding portion may comprise a guiding tape. A tape may comprise any type of
textile such as woven, non-woven, or knitted. Alternatively, or additionally, the
guiding tape may comprise an elastomer, for example polyethylene, polypropylene, chlorosulfonated
polyethylene, or polyester. This allows the guiding portion to be comfortable, low
friction, and low-weight, especially compared with, for example, a metallic structure.
[0017] The limitation strap may be slidably attached to the guiding portion by means of
a first essentially loop-shaped tape and/or a first ring. A first "essentially loop-shaped
tape" may or may not be a closed-loop. The first ring may have a number of shapes
including a circular shape, a rectangular shape, an oval shape, or variations thereof.
The first ring may or may not be closed. A ring may be made from a hard material such
as a metal or a hard plastic or it may be made from a soft material such as a soft
plastic. The first essentially loop-shaped tape or the first ring may comprise any
type of textile such as woven, non-woven, or knitted. It is only important that the
motion of the limitation strap is restricted to be along the guiding portion. Alternatively,
or additionally, the essentially loop-shaped tape or the ring may comprise an elastomer,
for example polyethylene, polypropylene, chlorosulfonated polyethylene, or polyester.
This allows the first loop-shaped tape or the first ring to be comfortable, low-friction
and low-weight.
[0018] It is also possible that the limitation arrangement comprises a guiding portion and
a first essentially loop-shaped tape and/or a first ring but no limitation strap.
This allows a particularly lightweight construction.
[0019] The limitation arrangement may be less elastic than the essentially elastic portion.
In this context, less elastic means that a greater force is required to extend the
limitation arrangement by a given amount, for example by 5% in length, than would
be required to extend the essentially elastic portion by the same amount, for example
5% in length. This difference may be effected by a different elastic modulus, also
known as Young's modulus, and/or by a different thickness. Therefore, the limitation
arrangement may effectively limit the maximum extension of the essentially elastic
portion. The elasticity of the limitation arrangement may be determined at least by
the elasticity of the limitation strap, the elasticity of the guiding portion, and
/ or the elasticity of the first essentially loop-shaped tape or the first ring.
[0020] The at least one second position may be vertically separated from the first position
by a first vertical distance. The separation by a first vertical distance allows the
tilt of the object in a static situation as well as the range of possible tilts during
dynamic movement to be engineered to allow a more ergonomic fit and better shock absorption.
[0021] The first vertical distance may be at least 2 cm, preferably at least 5 cm, more
preferably at least 8 cm. The greater the first vertical distance, the more stable
is the orientation of the object and the smaller is the range of possible tilts during
dynamic movement.
[0022] The first position located on the object may be located at a second vertical distance
of at least 2 cm below the top of the object, preferably at least 5 cm, more preferably
at least 10 cm. The greater the distance between the top of the object and the first
position, the higher the centre of mass of the object is located with respect to the
centre of mass of the body of the wearer. The inventors have found, that it is easier
for the wearer to carry the weight of the object if the centre of mass of the object
is arranged as high as possible with respect to the centre of mass of the body of
the wearer. This is especially true for objects worn on the back of the body, such
as backpacks.
[0023] The limitation arrangement may comprise a cushioning element. The cushioning element
serves two purposes. First, it provides comfort to the wearer through its cushioning
effect. Second, because of its thickness, the cushioning element may act as a pivot.
In combination with the essentially elastic portion, this creates a lever for pulling
the object into a more upright position during use, thus leading to more ergonomic
wearing properties. The cushioning element may act as a shoulder pad. If the limitation
strap is slidably attached to the guiding portion, this arrangement also allows the
cushioning element to better adapt to the shape of a shoulder, therefore distributing
the load more evenly than a conventional shoulder pad.
[0024] The essentially elastic portion may comprise at least a first layer and a second
layer. This way, the properties of the essentially elastic portion may be engineered
with a greater variety.
[0025] The first layer may comprise an elastic mesh. An elastic mesh is breathable and lightweight
and may be used to provide a highly elastic first layer.
[0026] The first layer may have a first elastic modulus, the second layer may have a second
elastic modulus, and the first elastic modulus may not be identical to the second
elastic modulus. This advantageously increases the range of elastic properties that
can be engineered for the essentially elastic portion. For example, the first elastic
modulus may be greater than the second elastic modulus or alternatively the second
elastic modulus may be greater than the first elastic modulus. A low elastic modulus
means that the material is more elastic, i.e. extends more under a given force.
[0027] The first layer may have a different length than the second layer. This further advantageously
increases the range of elastic properties that can be engineered for the essentially
elastic portion. For example, the first layer may be longer than the second layer.
Here, the length is determined along a longitudinal direction of the first layer.
For example, if the first elastic modulus is greater than the second elastic modulus,
the essentially elastic portion will then first extend rather easily under application
of force and then, when the second layer is extended to the same length as the first
layer, a greater force is required to further extend the essentially elastic portion.
This way, it is possible to engineer strength into the carrying system for heavy usage
situations.
[0028] The limitation arrangement may have a third elastic modulus and the third elastic
modulus may be lower than the first elastic modulus and the second elastic modulus.
For example, if the limitation arrangement has the same thickness as the first layer
and the second layer, the limitation arrangement may be less elastic than the first
layer and the second layer. This way the limitation arrangement may effectively limit
the maximum extension of the essentially elastic portion but allowing for a relatively
low thickness and thus weight of the limitation arrangement.
[0029] The limitation strap and/or the guiding portion may comprise a woven textile. Woven
textiles advantageously provide good strength and high breathability. Alternatively,
the limitation strap and/or the guiding portion may comprise any other type of textile,
such as non-woven or knitted textiles.
[0030] The essentially elastic portion may be attached to the limitation arrangement at
a third position located on the limitation arrangement. This way, the stability of
the carrying system is improved advantageously. Attached in this context may mean
attached directly.
[0031] The carrying system may further comprise a retaining element attached to the limitation
arrangement at a fourth position located on the limitation arrangement and a fifth
position located on the limitation arrangement, wherein the essentially elastic portion
is arranged between the retaining element and the limitation arrangement at the fourth
position and the fifth position, and wherein the essentially elastic portion is not
attached to the limitation arrangement at the fourth position and/or the fifth position.
If the essentially elastic portion is not attached to the limitation arrangement at
the fourth position and/or the fifth position, the adaptability of the carrying system
is advantageously improved. However, if the essentially elastic portion is arranged
between the retaining element and the limitation arrangement at the fourth position
and the fifth position, there is also an excellent stability.
[0032] A lateral movement of the essentially elastic portion with respect to the limitation
arrangement may be prevented or restricted at the fourth position and/or the fifth
position. This improves the lateral stability of the carrying system.
[0033] The retaining element may comprise a second essentially loop-shaped tape or a second
ring. The second essentially loop-shaped tape or the second ring, may have the same
properties as the first essentially loop-shaped tape or the first ring, respectively,
as described herein. Therefore, the second loop-shaped tape or the second ring is
comfortable and low-weight.
[0034] The retaining element may comprise an elastomer, for example polyethylene, polypropylene,
chlorosulfonated polyethylene, or polyester. Therefore, the retaining element is especially
durable and low-weight.
[0035] The essentially elastic portion and the limitation arrangement may be part of a carrying
strap. The advantageous properties of the essentially elastic portion and the limitation
arrangement are put to excellent use in a carrying strap.
[0036] The object may be a backpack or bag or a part thereof. The invention further concerns
a backpack or bag comprising at least one carrying system according to the present
invention as described herein. A backpack or a bag is typically worn over the shoulders
and may be worn on the back. Therefore, the advantageous properties of the carrying
system according to the present invention are particularly beneficial for a backpack
or a bag.
4. Short description of the figures
[0037] In the following, exemplary embodiments of the invention are described with reference
to the figures. The figures show:
- Fig. 1:
- shows an exemplary backpack and carrying system according to the present invention;
- Fig. 2:
- illustrates an advantage of an exemplary backpack and carrying system according to
the present invention;
- Figs. 3A-B:
- show a side view (Fig. 3A) and front view (Fig. 3B) of an exemplary carrying system
according to the present invention; and
- Figs. 4A-B:
- show an alternative embodiment of a backpack and carrying system according to the
present invention.
5. Detailed description of preferred embodiments
[0038] In the following only some possible embodiments of the invention are described in
detail. It is to be understood that these exemplary embodiments can be modified in
a number of ways and combined with each other whenever compatible and that certain
features may be omitted in so far as they appear dispensable. While the invention
is described primarily with reference to a carrying system 10 for a backpack 20, it
is to be understood that the carrying system 10 according to the present invention
may be used for carrying any object.
[0039] Fig. 1 shows an exemplary carrying system 10 for carrying an object 20, comprising:
an essentially elastic portion 11, wherein the essentially elastic portion 11 is attached
to the object 20 at a first position 17 located on the object 20; a limitation arrangement,
wherein a length of the limitation arrangement limits a maximum extension of the essentially
elastic portion 11; wherein the limitation arrangement is attached at a second position
on the object 20 that is different from the first position 17 (best shown in Fig.
3A). In this example, the limitation arrangement, of which the limitation strap 12
can be seen in Fig. 1, is arranged below the essentially elastic portion 11 on the
object.
[0040] The carrying system 10 advantageously dampens forces due to the vertical and horizontal
movement of the object during the movement of the wearer. The limitation arrangement
serves to stabilise the carrying system 10 by limiting the maximum extension of the
essentially elastic portion 11.
[0041] The limitation arrangement is less elastic than the essentially elastic portion 11.
In this example, a force of 120 N is required to extend the limitation arrangement
by 5% in length, while a force of only 20 N is required to extend the essentially
elastic portion 11 by the same fraction, 5%. In this example, this difference is effected
by a different elastic modulus, also known as Young's modulus, and by a different
thickness. The elastic modulus of the limitation arrangement is twice as large as
the elastic modulus of the essentially elastic portion 11. Moreover, the limitation
arrangement is three times as thick, meaning its cross-sectional area is three times
as large as that of the essentially elastic portion 11.
[0042] In this example, the backpack 20 comprises a main body 21, a left carrying system
10 and a right carrying system 10. Left carrying system 10 is part of a left shoulder
strap 26b and the right carrying system 10 is part of a right shoulder strap 26a.
The left shoulder strap 26b further comprises a male connecting element 15 and the
right shoulder strap 26a further comprises a female connecting element 16, allowing
the left carrying system and the right carrying system to be connected to one another
in order to improve the stability of the backpack 20 on the back of a wearer. Each
shoulder strap 26a, 26b also comprises a buckle 14 in order to adjust the total length
of the shoulder strap 26a, 26b.
[0043] The first position 17 located on the object is located a second vertical distance
23 of 5 cm below the top 22 of the object. The limitation arrangement comprises a
cushioning element. The limitation strap 12 also comprises a woven textile. The essentially
elastic portion 11 is attached to the limitation arrangement at a third position 31
located on the limitation arrangement. The carrying system 10 further comprises a
retaining element 13 described in more detail with reference to Fig. 3B below.
[0044] Fig. 2 illustrates an advantageous technical effect of the carrying system 10 according
to the present invention. An advantage of the carrying system 10 according to the
present invention is that the essentially elastic portion 11 pulls the object towards
the body 25 of the wearer and provides a shock-absorbing effect. In this example,
the object is a backpack 20. In this context, the wearer is the person carrying the
object by means of the carrying system 10. For example, the wearer may carry the backpack
20 on his back.
[0045] In this case the essentially elastic portion 11 will pull the backpack 20 towards
the back of the wearer.
[0046] Consider for example the situation in which the wearer makes a quick step or a jump.
This will cause a sudden acceleration of the backpack 20 both horizontally and vertically.
Reference sign 27a indicates the position of a backpack comprising a carrying system
10 according to the present invention during the acceleration. The backpack 20 has
tilted away from the body 25 of the wearer. When the backpack 20 is in position 27a,
the centre of mass of the backpack 20 is located at position 24a. The essentially
elastic portion of the carrying system 10 allows the backpack to move, therefore advantageously
allowing shocks to be absorbed. Reference sign 27b indicates the position of the backpack
20 shortly after the acceleration. The backpack 20 is quickly pulled back into a more
upright arrangement, in which the centre of mass 24b of the backpack 20, is located
closer to the body 25 than the centre of mass 24a during the acceleration, thus reducing
the torque exerted by the backpack 20 about a pivot, which may be a contacting point
between the object and the wearer.
[0047] Fig. 3A shows an exemplary carrying system 10 for carrying an object 20 (shown on
the left side), comprising: an essentially elastic portion 11, wherein the essentially
elastic portion 11 is attached to the object 20 at a first position 17 located on
the object 20; a limitation arrangement, wherein a length of the limitation arrangement
limits a maximum extension of the essentially elastic portion 11; wherein the limitation
arrangement is attached at a second position 34 on the object 20 that is different
from the first position 17. Note that the limitation arrangement is also attached
to the object 20 at the first position 17. However, what is important is that it is
also attached to the object 20 at the second position 34 that is different from the
first position 17. In this example, the limitation arrangement is arranged below the
essentially elastic portion 11 on the object. The essentially elastic portion 11 and
the limitation arrangement are part of a shoulder strap 26.
[0048] The limitation arrangement comprises a limitation strap 12 and a guiding portion
18, wherein the guiding portion 18 is attached to the object 20 at the second position
34, and wherein the limitation strap 12 is slidably attached to the guiding portion
18.
[0049] The guiding portion 18 comprises a guiding tape. The guiding tape comprises a woven
textile, comprising an elastomer, in this example polypropylene. The limitation strap
12 is slidably attached to the guiding portion 18 by means of a first essentially
loop-shaped tape 19, which also comprises a woven textile, comprising an elastomer,
in this example polypropylene.
[0050] The essentially elastic portion 11 comprises at least a first layer 11a and a second
layer 11b. The first layer 11a comprises an elastic mesh. The first layer 11a has
a first elastic modulus, the second layer 11b has a second elastic modulus, and the
first elastic modulus is not identical to the second elastic modulus. In this example,
the first elastic modulus is greater than the second elastic modulus. The first layer
11a has a different length than the second layer 11b. In this example, the first layer
11a is longer than the second layer 11b. The limitation arrangement has a third elastic
modulus and the third elastic modulus is lower than the first elastic modulus and
the second elastic modulus.
[0051] Fig. 3B shows a front view of the carrying system 10 for carrying an object shown
in a lateral view in Fig. 3A.
[0052] The essentially elastic portion 11 is attached to the limitation arrangement at a
third position 31 located on the limitation arrangement.
[0053] The carrying system 10 further comprises a retaining element 13 attached to the limitation
arrangement at a fourth position 32 located on the limitation arrangement and a fifth
position 33 located on the limitation arrangement, wherein the essentially elastic
portion 11 is arranged between the retaining element 13 and the limitation arrangement
at the fourth position 32 and the fifth position 33, and wherein the essentially elastic
portion 11 is not attached to the limitation arrangement at the fourth position 32
and/or the fifth position 33. A lateral movement of the essentially elastic portion
11 with respect to the limitation arrangement is restricted at the fourth position
32 and/or the fifth position 33. This improves the lateral stability of the carrying
system 10.
[0054] The limitation arrangement comprises a limitation strap 12 and a guiding portion
18, wherein the guiding portion 18 is attached to the object 20 at the second position
34, and wherein the limitation strap 12 is slidably attached to the guiding portion
18.
[0055] The guiding portion 18 comprises a guiding tape. The guiding tape comprises a woven
textile, comprising an elastomer, in this example polypropylene. The limitation strap
12 is slidably attached to the guiding portion 18 by means of a first essentially
loop-shaped tape 19, which also comprises a woven textile, comprising an elastomer,
in this example polypropylene.
[0056] The retaining element 13 comprises a second essentially loop-shaped tape. In this
example, the retaining element 13 comprises chlorosulfonated polyethylene.
[0057] Figs. 4A and 4B show an exemplary embodiment in which the limitation arrangement
is arranged above the essentially elastic portion 11 on the object 20. The object
20 is a rucksack and is shown as an outline only. The carrying system 10 for carrying
an object 20, comprises: an essentially elastic portion 11, wherein the essentially
elastic portion 11 is attached to the object 20 at a first position 17 located on
the object 20; a limitation arrangement, wherein a length of the limitation arrangement
limits a maximum extension of the essentially elastic portion 11; wherein the limitation
arrangement is attached at a second position 34a on the object 20 that is different
from the first position 17. Note that the limitation arrangement is also attached
to the object 20 at another second position 34b which is also different to the first
position 17. Both second positions 34a and 34b are located above the first position
17. However, it may also be possible that only one of the second positions 34a and
34b is located above the first position 17. In this example, the second position 34a
is vertically separated from the first position 17 by a first vertical distance of
5 cm. In this example, the elastic portion 11 is pleated.
[0058] The limitation arrangement, which limits a maximum extension of the essentially elastic
portion 11, comprises a guiding portion 18, a first essentially loop-shaped tape 19,
a first ring 41a and a second ring 41b. The essentially elastic portion 11 and the
limitation arrangement are part of a shoulder strap 26.
[0059] The guiding portion 18 is attached to the object 20 at the second positions 34a and
34b. The guiding portion 18 comprises a guiding tape. The guiding portion 18 is slidably
attached to a first essentially loop-shaped tape 19 and to the first ring 41a, i.e.
the essentially loop-shaped tape 19 and the first ring 41a may slide along the guiding
portion 18. The essentially elastic portion 11 is coupled to the limitation arrangement
by means of the second ring 41b through which the tape-shaped elastic portion 11 is
threaded.
Reference signs:
[0060]
10: carrying system
11: essentially elastic portion
11a: first layer
11b: second layer
12: limitation strap
13: retaining element
14: buckle
15: male connecting element
16: female connecting element
17: first position
18: guiding portion
19: first essentially loop-shaped tape
20: backpack
21: main body
22: top of backpack
23: second vertical distance
24: centre of mass of backpack
25: body of wearer
26: shoulder strap
27a: position during acceleration
27b: position shortly after acceleration
31: third position
32: fourth position
33: fifth position
34: second position
41: first ring
[0061] In the following, further embodiments are described to facilitate the understanding
of the invention:
- 1. A carrying system (10) for carrying an object (20), comprising:
- (a) an essentially elastic portion (11),
- (b) wherein the essentially elastic portion (11) is attached to the object (20) at
a first position (17) located on the object (20); and
- (c) a limitation arrangement, wherein a length of the limitation arrangement limits
a maximum extension of the essentially elastic portion (11), and
- (d) wherein the limitation arrangement is attached at least at one second position
(34) on the object (20) that is different from the first position (17).
- 2. The carrying system (10) according to the preceding embodiment, wherein the limitation
arrangement comprises a limitation strap (12) and a guiding portion (18), wherein
the guiding portion (18) is attached to the object (20) at the second position (34),
and wherein the limitation strap (12) is slidably attached to the guiding portion
(18).
- 3. The carrying system (10) according to the preceding embodiment, wherein the guiding
portion (18) comprises a guiding tape.
- 4. The carrying system (10) according to one of embodiments 2 or 3, wherein the limitation
strap (12) is slidably attached to the guiding portion (18) by means of a first essentially
loop-shaped tape (19) and/or a first ring (41).
- 5. The carrying system (10) according to one of the preceding embodiments, wherein
the limitation arrangement is less elastic than the essentially elastic portion (11).
- 6. The carrying system (10) according to one of the preceding embodiments, wherein
the at least one second position (34) is vertically separated from the first position
by a first vertical distance.
- 7. The carrying system (10) according to the preceding embodiment, wherein the first
vertical distance is at least 2 cm.
- 8. The carrying system (10) according to one of the preceding embodiments, wherein
the first position (17) located on the object (20) is located at a second vertical
distance 23 of at least 2 cm below the top (22) of the object (20).
- 9. The carrying system (10) according to one of the preceding embodiments, wherein
the limitation arrangement comprises a cushioning element.
- 10. The carrying system (10) according to one of the preceding embodiments, wherein
the essentially elastic portion (11) comprises at least a first layer (11a) and a
second layer (11b).
- 11. The carrying system (10) according to the preceding embodiment, wherein the first
layer (11a) comprises an elastic mesh.
- 12. The carrying system (10) according to one of embodiments 8 or 9, wherein the first
layer (11a) has a first elastic modulus, wherein the second layer (11b) has a second
elastic modulus, and wherein the first elastic modulus is not identical to the second
elastic modulus.
- 13. The carrying system (10) according to one of embodiments 8-10, wherein the first
layer (11a) has a different length than the second layer (11b).
- 14. The carrying system (10) according to one of embodiments 12-13, wherein the limitation
arrangement has a third elastic modulus and wherein the third elastic modulus is lower
than the first elastic modulus and the second elastic modulus.
- 15. The carrying system (10) according to one of the preceding embodiments, wherein
the limitation arrangement and/or the guiding portion (18) comprises a woven textile.
- 16. The carrying system (10) according to one of the preceding embodiments, wherein
the essentially elastic portion (11) is attached to the limitation strap (12) at a
third position (31) located on the limitation strap (12).
- 17. The carrying system (10) according to the preceding embodiment, further comprising
a retaining element (13) attached to the limitation arrangement at a fourth position
(32) located on the limitation arrangement and a fifth position (33) located on the
limitation arrangement, wherein the essentially elastic portion (11) is arranged between
the retaining element (13) and the limitation arrangement at the fourth position (32)
and the fifth position (33), and wherein the essentially elastic portion (11) is not
attached to the limitation arrangement at the fourth position (32) and/or the fifth
position (33).
- 18. The carrying system (10) according to the preceding embodiment, wherein the retaining
element (13) comprises a second essentially loop-shaped tape.
- 19. The carrying system (10) according to one of embodiments 17 or 18, wherein the
retaining element (13) comprises an elastomer.
- 20. The carrying system (10) according to one of the preceding embodiments, wherein
the essentially elastic portion (11) and the limitation arrangement are part of a
carrying strap.
- 21. The carrying system (10) according to one of the preceding embodiments, wherein
the object (20) is a backpack or bag, or a part (21) thereof.
- 22. A backpack or bag comprising at least one carrying system (10) according to one
of the preceding embodiments.
1. A carrying system (10) for carrying an object (20), comprising:
(a) an essentially elastic portion (11),
(b) wherein the essentially elastic portion (11) is attached to the object (20) at
a first position (17) located on the object (20); and
(c) a limitation arrangement, wherein a length of the limitation arrangement limits
a maximum extension of the essentially elastic portion (11), and
(d) wherein the limitation arrangement is attached at least at one second position
(34) on the object (20) that is different from the first position (17).
2. The carrying system (10) according to the preceding claim, wherein the limitation
arrangement comprises a limitation strap (12) and a guiding portion (18), wherein
the guiding portion (18) is attached to the object (20) at the second position (34),
and wherein the limitation strap (12) is slidably attached to the guiding portion
(18).
3. The carrying system (10) according to the preceding claim, wherein the guiding portion
(18) comprises a guiding tape.
4. The carrying system (10) according to one of the preceding claims, wherein the at
least one second position (34) is vertically separated from the first position by
a first vertical distance.
5. The carrying system (10) according to one of the preceding claims, wherein the first
position (17) located on the object (20) is located at a second vertical distance
23 of at least 2 cm below the top (22) of the object (20).
6. The carrying system (10) according to one of the preceding claims, wherein the limitation
arrangement comprises a cushioning element.
7. The carrying system (10) according to one of the preceding claims, wherein the essentially
elastic portion (11) comprises at least a first layer (11a) and a second layer (11b).
8. The carrying system (10) according to one of claims 5 or 6, wherein the first layer
(11a) has a first elastic modulus, wherein the second layer (11b) has a second elastic
modulus, and wherein the first elastic modulus is not identical to the second elastic
modulus.
9. The carrying system (10) according to claim 8, wherein the limitation arrangement
has a third elastic modulus and wherein the third elastic modulus is lower than the
first elastic modulus and the second elastic modulus.
10. The carrying system (10) according to one of the preceding claims, wherein the limitation
arrangement and/or the guiding portion (18) comprises a woven textile.
11. The carrying system (10) according to one of the preceding claims, wherein the essentially
elastic portion (11) is attached to the limitation strap (12) at a third position
(31) located on the limitation strap (12).
12. The carrying system (10) according to the preceding claim, further comprising a retaining
element (13) attached to the limitation arrangement at a fourth position (32) located
on the limitation arrangement and a fifth position (33) located on the limitation
arrangement, wherein the essentially elastic portion (11) is arranged between the
retaining element (13) and the limitation arrangement at the fourth position (32)
and the fifth position (33), and wherein the essentially elastic portion (11) is not
attached to the limitation arrangement at the fourth position (32) and/or the fifth
position (33).
13. The carrying system (10) according to one of the preceding claims, wherein the essentially
elastic portion (11) and the limitation arrangement are part of a carrying strap.
14. The carrying system (10) according to one of the preceding claims, wherein the object
(20) is a backpack or bag, or a part (21) thereof.
15. A backpack or bag comprising at least one carrying system (10) according to one of
the preceding claims.